920052018-01-10Prediction of Microstructure Evolution in DMLM processed Inconel 718 with Part Scale SimulationActiveJan 2017Jan 2020The goal of this project is to develop part-scale process-microstructure simulation tool to predict the microstructure evolution of Inconel 718 processed by powder bed laser fusion process. To achieve this goal, research efforts will be focused on (1) incorporating materials thermokinetics into thermal modeling for cyclic superheating and supercooling processes; (2) developing a new integrated phase transformation and grain texture model to predict microstructure evolution under complex heating and cooling cycles with high fidelity; (3) exploring simultaneous time scale parallelization and adaptive meshing to accelerate thermal modeling for part-scale process simulation. These innovations will lead to a robust simulation toolkit capable of predicting microstructure in an as-fabricated AM part given the process parameters.• Maximize freedom to design materials microstructure based on created reliable model. • The proposed process-microstructure modeling demonstrates the way to perform an efficient design-level simulation providing the method to evaluate in-situ phase stability. • Leading a direct approach to optimize laser process parameter to improve mechanical properties through designable as fabricated microstructure. • Paving the way for the future development of a simultaneous microstructure-topology optimization framework for the designing of AM structural metal components. • The proposed model can be directly adopted in design route for AM components leading a significant shortened design-cycle, and will assist in certifying an AM part for space mission.223Foundational KnowledgeSpace Technology Research GrantsSpace Technology Mission DirectorateUniversity of Pittsburgh theAcademicPennsylvaniaTherese GriebelKurt SackstederAlbert To